Method for recycling aluminum alloy section production wastewater and recovering sludge
A technology for producing aluminum alloy profiles and waste water, applied in water/sludge/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve environmental pollution and other problems, and achieve the solution of environmental pollution, sludge The effect of volume reduction
Inactive Publication Date: 2014-02-05
唐山紫天化工防腐有限公司
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[0013] The present invention will be further described below in conjunction with the examples, and the purpose is only to better understand the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.
[0014] see figure 1 , First, configure an alkaline liquid storage tank, an acidic liquid storage tank, a mediation reaction tank (or mediation reaction tank), and a concentration separator at the aluminum alloy profile production site. Then the discharge port of the alkaline liquid storage tank is connected with the liquid inlet of the mediation reaction tank through the lye pipeline and the lye pump 2, and the discharge port of the acidic liquid storage tank is connected with the acid solution pipeline and the acid pump 1 The liquid inlet of the mediation reaction pool is connected, and the liquid outlet of the mediation reaction pool is connected with the liquid inlet of the concentration separator through t...
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The invention relates to a sewage treatment method and specifically relates to a method for recycling aluminum alloy section production wastewater and recovering sludge. The method comprises the following steps: converging alkali corrosion waste liquor, water washing liquid after alkali corrosion and mold cleaning waste liquor which are generated in the production process steps of aluminum alloy sections into an alkine liquid storage tank, and converging a degreasing water washing liquid, a water washing liquid after oxidization, an oxidizing waste liquor and a neutralizing and degreasing waste liquor into an acidic liquid storage tank; next, carrying out a neutralization reaction between the alkaline liquor and the acidic liquid in a mediation reaction tank so that the PH value of the mixed waste liquor is in the range from 6.5 to 7.5, performing solid-liquid separation on the mixed liquor after the reaction by a concentration separator, and applying the waste water obtained after separation to the production process steps of aluminum alloy sections and the obtained mud cake as a by-product. The method provided by the invention is simple, low in investment, operation and maintenance costs, applicable to aluminum product enterprises, and capable of performing comprehensive circulation treatment on all waste water and waste liquor generated in aluminum alloy section oxidization; therefore, the environmental pollution problem caused by direct discharge of waste water and sludge generated in waste liquor treatment in the past is solved.
Description
technical field [0001] The invention relates to a sewage treatment method, in particular to a method for recycling waste water and sludge from the production of aluminum alloy profiles. Background technique [0002] At present, in the production of aluminum alloy profiles, the oxidation process adopts the traditional oxidation process, sulfuric acid degreasing is used for degreasing, and alkali etching is used for defilming. Such a production process will generate a large amount of wastewater and sludge. Specific sources of waste water and sludge include: ①All the alkali-containing liquid after washing the molds is discharged into the waste water, which wastes a lot of alkali and generates a lot of sludge every day; ②As the production progresses, the aluminum in the alkali etching tank continues to accumulate , when it reaches a certain level, it has to be discarded and discharged, which also wastes a lot of alkali and produces a lot of sludge; ③The oxidation bath is the sam...
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Inventor 项新成项悦鑫赵影
Owner 唐山紫天化工防腐有限公司